Had occasion to be out today, had to take my son's large dog for a run. While he was running, swimming etc, I decided to answer some basic question re the Lumix lenses in my bag, and what would be the differences in the following areas.
1. Would each lens fare as well on either the GH3 or the GX7,
2. Would there be noticeable difference in IQ between the popular lenses
3. Which lens would work best on which camera
I keep it simple, I did not set up either camera the way I would usually shoot, just turned on the iA setting, 200 iso, full image, no other settings, OOC JPG's, and took the same shot with each lens in turn on each of the two cameras.
Not scientific, just wanted to know.. lenses tested were...
-20mm f1.7 II model
-24mm f1.4 Pana Leica
-7-14mm f4.0 zoom Wide Angle
-12-35mm X f2.8 zoom
-14-45mm f3.5-5.6 zoom Original Kit Lens model
-14-140mm f4-5.8 zoom Original model[/COLOR]
My summary opinion subjective, FWIW... we are very lucky, m4/3 and Panasonic lens quality is excellent. To my mind, I would be happy with any of these lenses on either camera.
I did not test any other lenses, Lumix or others... no time and was out of scope.
Link to the test site, Photo-Matix Imagery | Lens Test - GH3 v GX7
All are open to downloading of the full size image if you want to pixel peep etc.
Opinions welcome, I would like to know what others think... the site is a decommissioned coal fired power station, Swanbank, Queensland.